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(No Model.) 2 Sheets-Sheet 1.

J. E; MILLER.

, GAS REGULATOR.

No. 337,012. Patented Mar. 2. 1886.

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N. PETERS. PllolO-Ulllogmphon Wuhiuginn, D. C.

(No Model.) 2 Sheets-Sheet 1.

J. E; MILLER. GAS REGULATOR.

No. 337,012. Patented Mar. 2. 1886.

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N- PETEHS, F'hohrl-ilhagnphur, Washington, D Q

(No Model.) 2 Sheets-Shet 2."

J. E. MILLER.

GAS REGULATOR;

.No. 337,012. Patented Mar. 2, 1886.

n. PETE-RS, Phnm-Lnhugmphan Wnshi c rrin TATES JOHN ERNEST MILLER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO AUGUSTUS H. HEISEY, OF SAME PLACE.

GAS- REGULATOR.

SPECIFICATION forming part of Letters Patent No. 337,012, dated March 2, 1856.

Application filed September 8, 1884. Renewed November 23, 1885. Serial No. 183.742.

; To all whom it may concern:

Be it known that I, JOHN E. MILLER, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and 5 useful Improvementin Gas-Regulators; andI do hereby declare the following to be a full, clear, and exact description thereof, reference being had to theaccompanying drawings, forming part of this specification, in which- Figure 1 is a vertical section of my improved regulator. Fig. 2is a cross-section on the line av of Fig. 1. Fig. 3 is a detached view of the valve partly broken away. Figs. 4. and 5 are detail views.

Like letters of reference indicate like parts in each.

The shell or case a of my improved regulator-valve is in this instance an ordinary steam-fitting, having an annular flange or seat extending across its interior cavity, below the inletopening a and above the outletopening a", so as to divide the interior into two chambers, a and a The inlet and outlet openings are provided. with suitable screwnozzles for the attachment of theusual pipes. The upper end of the shell is closed by a screwcap, b, which has a central opening, I), and a cup-shaped valve-chamber, W, on the upper side, and interposed between the end of the ring, b The lower end of the shell a is closed by a cap, 0, which screws onto the shell, and thereby secures a flexible diaphragm, d, in place in the valve, the cap screwing down upon the edge of the diaphragm, which is interposed between it and the end of the shell a. The cap 0 has a tubular projection extending from its outer side, which is externally threaded, so as to receive a cap, 9. Secured to the diaphragm d is a sleeve, d, which extends up into the tube 0', and has a threaded nozzle or end, d which extends through the diaphragm. The main valve 6 of the regulator is secured to the nozzle (1 by a screwsocket, e, and the construction of the parts is such that when the socket e is screwed onto the nozzle d the diaphragm is compressed between the end of the socket e and a flange, d which projects from the side of the sleeve d at the base of the threaded portion (1 The valve 9 is cylindrical in cross-section, and has shell (I. and the cap is a gasket or packing.

(N0 model.)

a reduced portion or stem, e, the internal shoulder between such reduced portion and the valve proper being preferably formed with a taper, e Extending axially through the valve 0 from the shoulder e to the upper end are holes or openings e, which, where they extend through the shoulder 6 are greatly reduced in size. The cap 9 screws ontov and closes the tube 0, anda spring, 71, is interposed between the cap 9 and the bottom of the recess e in the stem 0 the function of which is to hold thevalve 0 open. The normal position ofthe valve 6 is open, as shown in Fig. 1.

The tension of the spring is regulated by the screw-cap 9, so as to hold the valve eopen or away from its seat at any desired pressure of gas in the main. If this pressure should increase abnormally, it acts on the upperside of the diaphragm d with sufficient power to overcome the spring h, and thereby force the valve toward its seat a until it closes it sufficiently to give passage to the exact amount of gas which is being used. If no gas is being used in the service-mains, the pressure of the gas on the diaphragm d will cause the valve e to be closed. The valve e, being cylindrical, is balanced, there being no excess of pressure in any direction when it is closed.

The cup I) of the upper cap, I), is externally threaded, so

vided with a tube, 11, and a gasket, i around said opening on the under side of the cap. In the cup I) is a valve, k, having a facing. k, of rubber or other suitable material,and grooves 7c in its sides. This valve is closes the opening 1) in the upper cap, I), said opening b be ing of small diameter. The purpose of this construction of valve la is to permit the escape of any leakage from the valve-chamber when the valve 6 is closed.

Natural gas is so low in temperature as to contract the metallic surfaces with which it comes in contact,and is of such apenetrating nature that it isimpossible to prevent leakage between the sides of the valve and its socket and seat. The result is,that when the valve 6 is closed more or less leakage is going on from the chamber a through the seat and up along the sides of the valve. This leakage as to receive a screw-cap, i, in the upper end of which is an opening procollects in the top of the shell or, above the valve e, where it accumulates until it attains sufiicient pressure to raise the valve from its seat and escape through the grooves 7c and tube 13 into the open air.

When the valve 6 is open,and the gas is being used from the service-pipes, none passes up through the holes 6, for the reason that the pressure necessary to raise the valve 70 is less than that of the gas in the chamber a and service-mains connected therewith. The valve is may be adjusted by increasing or decreasing its weight or by regulating the size of the opening Z) to suit any desired pressure in the servicepipes.

Practical experience with my improved valve has proved its efficiency. It efi'ects a saving of gas,and is simple and cheap in construction.

Owing to the cylindrical portion of the valve fitting in a cylindrical cavit-yin the casing,the action of the valve is rendered regular and even. \Vhat I claim as my invention, and desire to secure by letters Patent, is

1.v The combination, in a gas-regulator, of a hollow casing, the interior of which is divided into chambers by a valve-seat, a valve situate I in one of the chambers and having a cylindrical portion fitting within a cylindrical cavity in the casing, a flexible diaphragm situate in the other chamber and connected with the valve, and aspringsituate in atubular stem extending from the valve so as to act thereon, substantially as and for the purpose specified.

2. The combination, in a gas-regulator, of 3 a cylindrical valve having holes which form communication between the outletchamber and the dome of the valve'case when the valve is closed, with a port extending between the dome-chamber and an auxiliary valve-chamher, which is closed by a valve capable of being raised by the pressure of gas in the dome chamber, whereby an outlet is afforded for the escape of leakage of gas in the valvechamber, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 5th day of September, A. D. 1884.

JOHN ERNEST MILLER.

Witnesses:

W. B. CoRwIN, THOMAS W. BAKEWELL. 

